Gas-furnace.



No. 629 478. Patented July 25,1899.

a. swmuELL. GAS FURNACE.

(Aglicati'on; filed May 12, 1899,)

(No Model.) 4 Sheets-Sheet I.

FIGZ. mum I 2 i 10 a 5 WHIH v r 2 mm 4 v FIG.3.

No. 629,478. Patented July 25, I899.

.1. c. SW INDELL. GAS FURNACE,

(Application filed May 12, 1899.)

(No Model.) 1 4 Sheets-Sheet 2,

FlB.4-. U54 ==fi 1 f 9 Fuel "w 7 Q L; J gg r/ I F r3 %rl= XV Wl/a No. 629,478 Patented July 25, I899.

. J. c. SWINDELL.

GAS FURNACE.

(Application. filed May 12. 18994) (No Model.)

4 sheets-sheaf 3.

FIGZ 76' FIGJO.

WITNESSES:

. UNITED STATES PATENT Trice.

JOHN C. SVINDELL, OF ALLEGHENY, PENNSYLVANIA.

GAS-FURNACE.

srncxnrcnrion forming part of Letters Patent No. 629,478, dated July 25, 1899.

Application filed May 12, 1899. Serial No. 716,595. (No model.)

To all w/wm, it may concern.-

Be it known that 1, JOHN C. SWINDELIJ', of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful'lmprovement in Gas- Furnaces, of which improvement the following is a specification.

My invention relates to furnaces in which gaseous fuel is employed; and its object is to provide means for heating air supplied for effecting the combustion of gas which shall be simple and inexpensive in construction and readily applicable in connection with gasfurnaces of various types.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a vertical longitudinal section through a construction illustrating an application of my invention in connectionwith a steam-boiler furnace, the section being taken at the line a a of Fig. 2; Fig. 2, a horizontal section through the same at the line b b of Fig. 3;

Fig. 3, a vertical transverse section at the line a c of. Fig. 1; Fig. 4, a vertical longitudinal section through a metallurgical furnace of the reverberatory type with my invention applied, the section being taken at the line (1 d of Fig. 5; Fig. 5, a horizontal section through the same at .the line a e of Fig. 4; Fig; 6, a vertical transverse section at the line'ff of Fig. 5; Fig. 7, a vertical longitudinal section through a metallurgical furnace of the same general type as that shown in- Figs. 4; to 6, showing an application of my invention in connection with means for heating air by waste gases, the section being taken at the line g g of Fig. 9; Fig. 8, a similar section at the line h h of Fig. 9; Fig. 9, a horizontal section at the line 2' i ofFigs. 7 and 8; Fig. 10, a vertical transverse section at the line'k k of Fig. 7; Fig. 11, a similar section at the line Z Z of Fig. 8; Fig. 12, a vertical longitudinal section through a construction illustrating an application of my invention in connection with another form of metallurgical furnace, the section being taken at the line m m of Fig. 16; Fig. 13, a similar section 'tion-chamber 10.

line 1' r of Fig. 13, and Fig. 17 a similar sec tion at the line 8 s of Fig. 13.

Referring first to Figs. 1 to 3, inclusive, in the practice of my invention I construct within a suitable casing 1, of brick or masonry,

the air-chambers 2 is adjoined on one or on both of its longitudinal sides by a gas-chamber 3, to which gas is supplied at its lower end through gas-supply ports 4, opening into a gas-supply flue or conduit 5, located below the gas chamber or chambers 3 and communicating through a connecting-flue 5 with a gas-supply pipe 6, leading from a producer or other source of supply and controlled by a valve 7. A plurality of air-deli'veryports 8 is formed in the wall or walls of each of the air-chambers 2, which separates said chamber from the adjoining gas chamber or chambers, said air-delivery ports being located at different-levels in said Wall or walls and distributed at different points in the length of each of the air-chambers The gas chamber or chambers 3 is or are open at top to a combustion-chamber 9, which may, as in the instance shown, communicate with a supplemental combusof' steam-boilers 11 is set in'the combustion- In this instance a battery chambers 9 and 10, and the products of combustion pass from said combustion-chambers through the fines 12 of the boilers to an exit flue or stack 13. In operation air is discharged from each of the air-chambers 2 through the air-delivery ports 8 into the adjoining gas-chambers 3, and the mixture of air and gas is ignited and burns at the outer ends of the ports 8.. The larger portion of the air passes out through the upper ports, and the walls of the air-chambers becoming heated by the combustion at thelevels of the lower ports impart their heat to the air as it passes through the air-chambers, and that portion which is delivered through the upper fore its delivery to and admixture with the gas. The products of combustion exert their heat in the combustion-chamber which immediately communicates with the gas-chambers and in the connected furnace or combustionchamber and are discharged from the latter into the stack.

Figs. 4 to 6, inclusive, illustrate the application of my invention in a manner similar in all essential particulars to that practiced in the construction above described in connection with a metallurgical furnace of the reverberatory type. In this instance only one air supply and heating chamber 2 is provided, and the supplemental combustionchamber 10 constitutes the working chamber or furnace-chamber proper. The means for supplying air and gas, efiecting the admixture thereof, heating the air, and applying the heat of the products of combustion are in each case similar to those first described. It will be obvious that, if desired, two or more air-chambers 2, each adjoined by a gas-chamber 3, may be employed without variation of operative principle. 7

As shown in Figs. '7 to 11 my invention is applied in a similar mannerin connection with a furnace of the reverberatory type, but with the addition of means for preliminarily heating the air by the waste gases in their traverse from the furnace-chamber to the stack.

The construction of the air-chambers 2, two

of which are shown, and their communication with the gas-chambers 3 by the series of airdelivery ports 8 are the same as in the instances before described. The supply of air to the chambers 2 is in this instance effected through air-supply flues 14, the inlets or outer ends of which may be controlled by doors 2, said fines extending longitudinally below the air and gas chambers and the furnace-chamher and communicating, by ports 15 at their inner ends, with superposed return-fines 16, the opposite ends of which communicate, by ports 17, with the bottoms of the air-chambers 2. The products of combustion escape from the furnace-chamber 10 through ports 18 at the end thereof farther from the air and gas chambers into longitudinal waste-fines 19, the opposite ends of which communicate, by ports 20, with lower return waste-fines 21, leadingto the stack 13. The Waste-fines 19 21 are located immediately adjoining the airsupply flues 14 1(l,and the currents ofair which pass through said air-supply fines to the airchambers 2 are preliminarily heated by the waste products of combustion passing out through the waste-fines 19 21.

heating chamber 2 is provided, this being of the same form and proportions as those of the constructions previously described-that is to say, set vertically, of substantially rectangular transverse section, and comparatively narrow or thin relatively to its length and height. The air-chamber 2 is interposed between and immediately adjoins a gas-chamher 3, with which, as in the previousinstances,

it communicates by a plurality of air-deliv-v ery ports 8, and which is open at its top to the combustion or furnace chamber 9 and a wasteflue 19, leadingdownwardly from the furnacechamber 9. The gas-chamber 3 and wasteflue 19 are closed on their outer sides by the walls of the setting 1. Air is supplied to the air-chamber 2 through supply-ports 2, controlled by doors 2", and gas is supplied to the gas-chamber 3 from a gas-supply pipe 6, controlled by a valve 7, which when open establishes communication between the pipe 6 and a gas-supply line 5, located below the gaschamber 8, and communicating therewith by ports 4 in its floor. The waste-flue 19 communicates by ports 20 with a lower horizontal waste-flue 21, leading tothe stack 13. If desired, the construction shown may be duplicatedthat is to say, an additional airchamber 2 and waste flue 19 may be employed-the gas-chamber 3 being intermediate between the two air-chambers, and the waste prod ucts being discharged at opposite sides of the combustion-chamber, so that one side of each air-chamber shall be exposed to their heat. Again, a plurality of air-chambers, with interposed gas-chambers, as in Figs. 1 to 8, may be provided and waste-fines 19 be led downwardly from each side of the combustion-chambcr, so that the heat of the escaping products may act upon the adjacent sides of the two outer air-chambers. In operation the gas is ignited at the ports 8 of the air-chamber 2, and the air supplied thereto is heated by the combustion of the mixture of gas and air on that side of the air-chamber, as in the previous instances, and is also heated by the waste products of combustion in their traverse through the waste-flue 19, immediately adjoining the opposite side of the air-chamber.

The essential and characteristic feature of my invention, as exemplified in the several constructions herein described and shown, consists in the provision of one or more vertical air heating and supply chambers, communicatin g bya plurality of air-delivery ports with an adjoining gas chamber or chambers, whereby the air supplied for admixture with the gas is heated in its traverse through the air chamber or chambers by the combustion of the mixture of gas and airin the adjoining gas chamber or chambers and also in the provision of means whereby the air maybe likewise heated by the waste products of combustion in their traverse to a discharge flue or stack.

I claim as my invention and desire to se cure by Letters Patent- 1. In a gas-furnace, the combination of a vertical air supply and heating chamber, a gas-chamber adjoining said air-chamber, a plurality of air-delivery ports, located at different levels in the wall separating the air and gas chambers, means for supplying air and gas respectively to said chambers at or near their lower ends, and a combustion-chamber communicating with the gas-chamber.

2. In a gas-furnace, the combination of a plurality of vertical air supply and heating chambers, a plurality of gas-chambers, each adjoining one of said air-chambers, air-delivery ports located at different levels in the walls separating the'air and gas chambers, means for supplying air and gas respectivelytosaid chambers attheirlower ends, and a combustion-chamberlocated above and com municating with each ofthe gas-chambers.

3. In a gas-furnace, the combination of a plurality of vertical air supply and heating chambers, a plurality of gas-chambers, each adjoining one of said air-chambers, air-delivery ports located at diiferent levels in the Walls separating the air and gas chambers, means forsupplying air and gas respectively to said chambers at their lower ends, a'combustion-chamber located above and communicating with each of the gas-chambers, and means for heating air supplied to the airchambers by the Waste products in their trav erse from said combustion-chamber to a discharge fine or stack.

4. In a gas-furnace, the combination of a vertical air supply and heating chamber, a gas-chamber adjoining one side of said airchamber, a plurality of air-delivery ports located at different levels in the Walls separating the air and gas chambers, means for supplying air and gas respectively to said chambers at or near their-lower ends, a combus tion-chamber located above and communicating with the gas-chamber, and a waste: flue leading downwardly from said eombus= tion-chamber and adjoining the air-chamber on the. side thereof farther from the gas chamber.

JOHN C. SWINDELL.

Witnesses:

J. SNOWDEN BELL, CLARENCE A. W LLIAMS. 

